Function validatePRConfig

src/App.tsx:35–44

(templates: PRTemplate[])

// ─── Validation ──────────────────────────────────────────────────────
function validatePRConfig(templates: PRTemplate[]): string | null {
  if (templates.length === 0) return 'No pull requests to create. Generate them first.';
  if (templates.length > MAX_ITEMS) return `Maximum ${MAX_ITEMS} PRs allowed.`;
  const branchNames = new Set<string>();
  for (const pr of templates) {
    if (branchNames.has(pr.branchName)) return `Duplicate branch name: "${pr.branchName}".`;
    branchNames.add(pr.branchName);
  }
  return null;
}

function validatePairConfig(coAuthors: CoAuthor[], templates: PairTemplate[]): string | null {
  const validCoAuthors = coAuthors.filter(ca => ca.name.trim() && ca.email.trim());